Of course it's a little difficult to capture something that moves, but I think I got a few pictures that show how he's up on hands and knees now. Still, when he gets tired or frustrated, he just kind of moves from the crawling position and will just lean back and sit on his bottom. Then when he's ready to go again, he just starts crawling away.
Even just last week, you could sit Max on a blanket with some baby toys and he would sit there and play happily for a long time. Not any more. Now that he's figured out he can get away, he just decides to venture off and explore different parts of the room. And since Zahra is usually all over the place, he just tries to get to wherever she happens to be at the moment.